From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id ABCBEC77B6E for ; Wed, 5 Apr 2023 21:38:17 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pkAoH-0005PP-Kz; Wed, 05 Apr 2023 17:36:53 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pkAo7-0005KK-Tn for qemu-devel@nongnu.org; Wed, 05 Apr 2023 17:36:46 -0400 Received: from mail-il1-x12f.google.com ([2607:f8b0:4864:20::12f]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1pkAo6-0005dD-Aj for qemu-devel@nongnu.org; Wed, 05 Apr 2023 17:36:43 -0400 Received: by mail-il1-x12f.google.com with SMTP id h11so19505547ild.11 for ; Wed, 05 Apr 2023 14:36:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bsdimp-com.20210112.gappssmtp.com; s=20210112; t=1680730601; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=N8f0c0zWU0uf6KygAvtJ1QQK3oFJ68EqdIaad3VmCHw=; b=WcKg6DHxtwKuCxPiKbXzDlgVNt/oS8V4wQB+2ckROdhWcf4key7b7E34f8VhWWF5tj Bo8pC0WnUFzGwt9Nou3Vfp2TdXyer/VhtbSUckKGITxd8oKwyMIEkS3Q+yMtkMrGMijx TU+4flxrsrYKl+u6jUpXe7cd0RFwOGII8RqsSTqrNiiJVs/Czr1wKwx9tWWsL+aFjgcY o6C3hR2amAirxc5pC5/Lk0D2zp7TXIXJkF3/uallRmooYVHdqiln6Fqi4JOxYJbAUMix ZEHRlqZ97vg4yHgdSXguzizVd/6UPPWiykQ/8SMrd7kmu1Enid+eyO7DF+wUCBiql7nY 4ngA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680730601; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=N8f0c0zWU0uf6KygAvtJ1QQK3oFJ68EqdIaad3VmCHw=; b=Ab8Clg30CPTzgAEpn3WTxl8/TcbBE/RTB7HSCujOLgpoNe2nPBKtviEg0348Znnd1Q OTLtbUnLY+IyMDjRo1wRrIGOXsJaFi43DbVOHZIaDW/qNrb5ihPvIrNA5rKYPhYv9FY/ d5DBwSEEiDybn+YTcHCzV6ZvAsKWZ1aksWKgniP47k24RcMtSkeI3lxoYi5hiN8F/pD8 fwW8JTIS/ZjZeW+CzQG2qX/mrPfSL/J5oVR4KfzzDttwcWsnlvoOXsUOLcU9cPLGZZyZ TfuMNahiE46SZpjmxRwwaY9M9EgX56xTCTXnD49NG0bLIE4dm4XBAYwDYrOuVcqYhwM0 0iKA== X-Gm-Message-State: AAQBX9fKU0+FvMs+QEnJHweCTz6y+eCYAs0Y4aJy+eS6xEYcr6CWzFcq RI5EPAATvWo7E7hx7pwy4WyEZFt+s7vea1b7iBg= X-Google-Smtp-Source: AKy350ZDd/Mnz+HJANkpJqgIG/zQmfUNStlLhfeiAer8g5ymkjGxfYbgdSdCplRb5pUQlQF1OU3XmQ== X-Received: by 2002:a05:6e02:14c:b0:317:99d0:8afa with SMTP id j12-20020a056e02014c00b0031799d08afamr5500364ilr.12.1680730600906; Wed, 05 Apr 2023 14:36:40 -0700 (PDT) Received: from dune.bsdimp.com (c-71-237-47-177.hsd1.co.comcast.net. [71.237.47.177]) by smtp.gmail.com with ESMTPSA id i18-20020a926d12000000b003261b6acc8asm4110473ilc.79.2023.04.05.14.36.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Apr 2023 14:36:40 -0700 (PDT) From: Warner Losh To: qemu-devel@nongnu.org Cc: reinoud@netbsd.org, riastradh@netbsd.org, ryoon@netbsd.org, jrtc27@jrtc27.com, Warner Losh , kevans@freebsd.org, Brad Smith Subject: [PATCH 16/16] bsd-user: Implement SIGSYS on arm Date: Wed, 5 Apr 2023 15:36:12 -0600 Message-Id: <20230405213612.15942-17-imp@bsdimp.com> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230405213612.15942-1-imp@bsdimp.com> References: <20230405213612.15942-1-imp@bsdimp.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: none client-ip=2607:f8b0:4864:20::12f; envelope-from=imp@bsdimp.com; helo=mail-il1-x12f.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org When a system call returns ENOSYS, send a SIGSYS to the process (to generate a core dump). Signed-off-by: Warner Losh --- bsd-user/arm/target_arch_cpu.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/bsd-user/arm/target_arch_cpu.h b/bsd-user/arm/target_arch_cpu.h index 517d0087644..c4b21fef713 100644 --- a/bsd-user/arm/target_arch_cpu.h +++ b/bsd-user/arm/target_arch_cpu.h @@ -127,6 +127,14 @@ static inline void target_cpu_loop(CPUARMState *env) env->regs[15] -= env->thumb ? 2 : 4; break; } + /* + * Emulate BSD's sigsys behavior on unimplemented system calls. + * XXX may need to gate this somehow or arrange for sigsys to be + * masked in some use cases. + */ + if (ret == -TARGET_ENOSYS) { + force_sig_fault(TARGET_SIGSYS, SI_KERNEL, env->regs[15]); + } if ((unsigned int)ret >= (unsigned int)(-515)) { ret = -ret; cpsr_write(env, CPSR_C, CPSR_C, CPSRWriteByInstr); -- 2.40.0